A BRITISH mother who fled Britain to join Islamic State terrorists is believed to have been filmed leading an army of female jihadists.

Mum-of-two Sally Jones, 45, of Chatham in Kent, is thought to feature in the video of gun-toting militants in al-Khanssaa Brigade – the all-women group set up by IS.

The former punk rocker escaped to the Middle East in 2013 after converting to Islam in the wake of the 2003 Iraq invasion.

She has changed her name to Umm Hussain al-Britani and claimed to have wed jihadi computer hacker Junaid Hussain, 20, who was jailed in 2012 for stealing personal information from former prime minister Tony Blair.

The chilling new video shows an army of women marching with firearms and appearing to be on a training mission.

As they chant they raise their weapons into the air in a brazen show of loyalty.

The video, which is dubbed with Arabic music, then sees the women shooting into the distance in a show of force.

YOUTUBE

Female extremists march in line with guns

YouTube

In the video numerous armed women are seen firing guns

The threat she poses to our security should not be underestimated

Security chief

They are all wearing the full black burka, with some in trainers.

Security chiefs think the video shows Ms Jones, according to the Daily Mirror.

“This could be the first real evidence that Sally Jones is involved at a high level with al-Khanssaa,” a source told the newspaper.

“Her public statements cause great concern and are being taken incredibly seriously. The threat she poses to our security should not be underestimated.”

She is wanted in the UK for numerous terror offences.

She has previously tweeted that she wanted to kill Christians.

She wrote: "You Christians all need beheading with a nice blunt knife and stuck on the railings at raqqa…Come here I'll do it for you.”

The al-Khanssaa brigade is a female-only militia set up by the Islamic State in their self-declared capital of Raqqa, Syria.

The religious police force punishes women for 'un-Islamic' behaviour – with one of the group's key figures believed to be Aqsa Mahmood, 20, of Glasgow, who fled to the Middle East in 2013.

Mahmood recently denied recruiting three schoolgirls from the Bethnal Green Academy in east London, who are feared to have travelled to Syria earlier this year.